发明授权
- 专利标题: Wide angle objective lens system
- 专利标题(中): 广角物镜系统
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申请号: US958427申请日: 1978-11-07
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公开(公告)号: US4211472A公开(公告)日: 1980-07-08
- 发明人: Akiyoshi Nakamura
- 申请人: Akiyoshi Nakamura
- 申请人地址: JPX Sakai
- 专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人地址: JPX Sakai
- 优先权: JPX52-138101 19771116
- 主分类号: G02B9/60
- IPC分类号: G02B9/60 ; G02B13/04 ; G02B11/30
摘要:
A compact wide angle lens system for use in a camera having a range finder is provided. The lens system is of five-group, seven-element type comprising, consecutively from the object to the image side, a first lens group consisting of a negative meniscus single lens convex to the object side, a second lens group consisting of a positive doublet having a cementing surface concave to the object side, a third lens group consisting of a negative meniscus single lens concave to the object side, a fourth lens group consisting of a positive doublet, and a fifth lens group consisting of a negative meniscus single lens concave to the object side.
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